diff --git a/ui/hooks/useMultichainAccountsIntroModal.test.ts b/ui/hooks/useMultichainAccountsIntroModal.test.ts
index a2faf6c2577..a84a613d402 100644
--- a/ui/hooks/useMultichainAccountsIntroModal.test.ts
+++ b/ui/hooks/useMultichainAccountsIntroModal.test.ts
@@ -1,4 +1,4 @@
-import { lt as semverLt } from 'semver';
+import { lt as semverLt, coerce as semverCoerce } from 'semver';
 
 // Test the core logic independently of React hooks
 describe('BIP-44 Banner Logic', () => {
@@ -16,7 +16,17 @@ describe('BIP-44 Banner Logic', () => {
     const isUpgradeFromLowerThanBip44Version = Boolean(
       lastUpdatedFromVersion &&
         typeof lastUpdatedFromVersion === 'string' &&
-        semverLt(lastUpdatedFromVersion, BIP44_ACCOUNTS_INTRODUCTION_VERSION),
+        (() => {
+          try {
+            const coercedVersion = semverCoerce(lastUpdatedFromVersion);
+            return (
+              coercedVersion &&
+              semverLt(coercedVersion, BIP44_ACCOUNTS_INTRODUCTION_VERSION)
+            );
+          } catch {
+            return false;
+          }
+        })(),
     );
 
     return (
@@ -171,5 +181,32 @@ describe('BIP-44 Banner Logic', () => {
       );
       expect(result).toBe(false);
     });
+
+    it('handles invalid semver version like 13.9.0.150 (4-part version)', () => {
+      // This tests the bug fix for extensions with non-standard version formats
+      const result = shouldShowBip44Banner(
+        true,
+        true,
+        false,
+        Date.now(),
+        '13.9.0.150', // Invalid semver - 4 parts
+        true,
+      );
+      // Should gracefully handle and return false (coerced to 13.9.0 which is >= 13.5.0)
+      expect(result).toBe(false);
+    });
+
+    it('handles invalid semver for older version like 13.4.0.100', () => {
+      const result = shouldShowBip44Banner(
+        true,
+        true,
+        false,
+        Date.now(),
+        '13.4.0.100', // Invalid semver - 4 parts, but coerces to 13.4.0
+        true,
+      );
+      // Should coerce to 13.4.0 and show banner
+      expect(result).toBe(true);
+    });
   });
 });
diff --git a/ui/hooks/useMultichainAccountsIntroModal.ts b/ui/hooks/useMultichainAccountsIntroModal.ts
index 0d37eb8b4c6..20ab848cbe4 100644
--- a/ui/hooks/useMultichainAccountsIntroModal.ts
+++ b/ui/hooks/useMultichainAccountsIntroModal.ts
@@ -1,5 +1,5 @@
 import { useState, useEffect } from 'react';
-import { lt as semverLt } from 'semver';
+import { lt as semverLt, coerce as semverCoerce } from 'semver';
 import { useAppSelector } from '../store/store';
 import { getIsMultichainAccountsState2Enabled } from '../selectors/multichain-accounts/feature-flags';
 import { getLastUpdatedFromVersion } from '../selectors/selectors';
@@ -40,10 +40,22 @@ export function useMultichainAccountsIntroModal(
     const isMainWalletArea = location.pathname === DEFAULT_ROUTE;
 
     // Check if this is an upgrade from a version lower than BIP-44 introduction version
+    // Extension versions may not be valid semver therefore we coerce them first
     const isUpgradeFromLowerThanBip44Version = Boolean(
       lastUpdatedFromVersion &&
         typeof lastUpdatedFromVersion === 'string' &&
-        semverLt(lastUpdatedFromVersion, BIP44_ACCOUNTS_INTRODUCTION_VERSION),
+        (() => {
+          try {
+            const coercedVersion = semverCoerce(lastUpdatedFromVersion);
+            return (
+              coercedVersion &&
+              semverLt(coercedVersion, BIP44_ACCOUNTS_INTRODUCTION_VERSION)
+            );
+          } catch {
+            // If version can't be parsed, assume it's not from an old version
+            return false;
+          }
+        })(),
     );
 
     // Show modal only for upgrades from versions < BIP-44 introduction version